International Congress of Sound and Vibration 10 Stockholm 2003 - 20/06-2005

The design of low noise machinery does often meet many challenges. The noise sources can be described by an emprical formula developed in-house at the manufacturer. The load carrying structure is a shell of complicated geometry, the cover plates are simple flat plates, and the silencers for the intake and exhaust are designed by a third party software. The task of designing the optimum solution with respect to noise and economy is also a coordination between the different tools involved in the prediction of acoustic characteristics of each component.

A systematic approach and a common base for handling the data in one combined model is a wish of many engineers and developers. One way to systematise the inputs to such a model is to think in terms of an acoustic component model, where all components are described with an as simple as possible and as complicated as necessary approach to the modeling. This way a systhesis of sound powers, transfer functions, radiation behaviour of different tools are combined to one model which has a finite number of simple components.

This paper gives examples of the technique and cases for illustration.

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Systematic Design of Low Noise Machinery (104 kB)